#!/usr/bin/env python3
import time
from pymodbus.client import ModbusTcpClient

WISE_IP = "10.43.54.249"
UNIT = 1


def u32_lo_hi(lo, hi):
    return (lo & 0xFFFF) + ((hi & 0xFFFF) << 16)


client = ModbusTcpClient(WISE_IP, port=502, timeout=2)

if not client.connect():
    raise RuntimeError("No conecta con WISE")

last_di1_counter = None

try:
    print("Leyendo contador DI1 por Modbus/TCP. Pulsa DI1 y observa cambios.")
    while True:
        rr = client.read_holding_registers(
            address=0,
            count=4,
            device_id=UNIT,
        )

        if rr.isError():
            print("ERROR:", rr)
            time.sleep(1)
            continue

        regs = rr.registers

        di0_counter = u32_lo_hi(regs[0], regs[1])
        di1_counter = u32_lo_hi(regs[2], regs[3])

        if di1_counter != last_di1_counter:
            print(
                f"DI0_counter={di0_counter} "
                f"DI1_counter={di1_counter} "
                f"raw={regs}"
            )
            last_di1_counter = di1_counter

        time.sleep(0.2)

except KeyboardInterrupt:
    print("Parado")

finally:
    client.close()